@Chwaee:
… second SSID ... different WPA2 password, however I could not put it on a different frequency ... which is super annoying.
I think this is either a hardware limitation with the PCIe card, an OS limitation in BSD, or a driver limitation of sorts.
Technical suggestion: it's a limitation of the admin to understand how WiFi with multiple SSIDs on the same wireless NIC works.
Multi-SSIDs will always be the same channel. It just broadcasts a different SSID simultaneously, which obviously happens on the same frequency/channel.
You have already been told that FreeBSD's support for WiFi is "minimal" at best. Keep that in mind before posting something about limited wireless config options or less than expected WiFi throughput and such.
Best option is to buy a used Ruckus 7372/7982 on eBay for $40 and forget about all WiFi troubles. Even though you don't wanna hear that.
You have been warned…